How To Decide What Lego Sets To Part Out or Invest In?

With the ever growing market of Lego itself and resellers, there is no surprise that more and more of us are wanting to join the game.

The key question is how do you decide which sets to part out and which to invest in? 

Depending on what you are wanting to sell and where and who to can alter what you need to be looking for on the market. If you are wanting to resell at shows and toy fairs check out my post here.

Investment – What Should I Be Looking For?

This is a rare Lego part from the Star Wars Millenium Falcon UCS.

When looking at sets to invest in, you want to be looking for something unique about the set. Usually, you want to pick up Lego sets that are larger, like the modular buildings, winter sets, special editions and sometimes even the smaller ideas sets.

You also want to be looking for a set that has a unique figure in, forget about the dime a dozen figures that come in more than 1 set or are likely to be mass produced, you want to aim for a unique Minifigure.

Finding a set that will have a special edition Minifigure included or a Minifigure that will more than likely only to be produced for that set alone. The unique Minifigure is what instantly adds value to a set as some collectors will only collect Minifigures.

Popular and in demand Lego sets that are now retired are sets such as the Modulars e.g The Green Grocer, The Town Hall and  The Fire Station, these at the time weren’t overly popular and so once retired and then sky rocketed from builders and collectors wanting to complete their collection. Modulars have become popular and now flood the market as many people were hoping the trend would happen again as they did the older sets.

The key is to look for a trend that no one else has yet found, something that not everyone has already invested in or could be a dark horse. There are many sites such as BrickPicker where you can look into the market of Lego and get more information and knowledge of the resale value and sets to invest in.

Parting Out – What Should I Be Looking For?

With so many new builders, MOC’ers and creators coming into the Lego community come the suppliers of the goods themselves. The key points you want to look out for in parting out is price, part count and practicality.

There are more options than just parting out new Lego sets, you can also look into buying used lots from car boots, eBay or gumtree, these used lots can hold retired sets, unique parts and rare Minifigures. If you want to know more about whether you should sell new or used Lego, check my post. 




This particular part is very popular in many sets, used for headlights, fires and much more. This part is very common and not often used with MOC’ers.

When I say practicality you want to have a good range of parts in a set, within the set it needs to have the ordinary pieces that are needed such as 2 x 4 bricks to create a base and then an influence of a new or sought after a part that isn’t as common.

There is no point picking up a set that has a lot of parts that aren’t already selling or selling very slowly in your inventory. 


Price is always a big part to parting out, generally work on a double or triple scale. If the set costs £5.99 you potentially want it to part out for £12.00 or even better £18.00.

When working with the part out you generally want to have room to discount for any low months you may want a sale or for if you put on any promotions. This will allow you to still make a profit on your parts without coming too close to breaking even.

We worked on a double to triple price range, so a £6 set would part out for £12 or even £18, however, this is just one example others may look to earn their money back from purchasing the set in Minifigures along ensuring the parts are pure profit before fees. 

Part Count

Not all sets will have everything you want from it, some parts you may have an abundance of already that are selling at a slower rate compared to the other parts. This is where you want to make sure that you are paying what you feel it worth it.

Say you have 25 parts in a set, 10 of those parts you already have 100 of and are struggling to sell, what does the set then mean to you in value? If you can make enough profit on the remaining 15 parts enough to cover the slower selling 10 then get it. 

This, however, will depend on your storage sets up and time, some people don’t mind having the parts that will sell at a slower pace as they will still sell. If you are working on creating a way to maximise your storage space and look to organise your Lego parts more efficiently check out my post on how to store a Lego collection.


Leave A Comment