Try not to buy domains you are going to sell based on your liking of them (only for hobbies and personal use) as this can obscure your judgement as to what it's potentially worth to the buyers. Just because you like it does not necessarily mean others will
Buy based on the market trends, what actually sells, and if you like it too then that's a bonus.
What makes you think this is "Gold"? Other than your love for the name.
In my opinion the value is $xx as a basic 5L.com. Possibly low $xxx or more to the right end user, but there are many 5L.coms available which are more pronounceable and brandable so you'll either have to push it to find that buyer, or wait for a year or two.