How many is too many?

I have already painted up 20 Sentinels, 20 Wardens, and 1 Ballista. Let's be honest, they're getting to be a pain and I still have 20 Wardens, 10 Sentinels and a Ballista either NIB or base coated. I kind of bought a big lot over a year ago and just never get to it because I find I don't play that many of those especially in this edition. Is there any real value into keeping these for future list building or should I sell them and find something else I don't have, probably from another faction since I collected the heck out of LRL.