For resale alone I would buy the FEL.
For me it is my most used attachment. Second is the ballast block. Third is the rake, then the tiller, then the hydraulic auger.
One point about the FEL/3pt.
Yes you can drag 3pt implements around without the FEL, however the FEL ENHANCES many of them.
Weight - much better 4x4 traction
Rake - I always end up with piles that the FEL takes care of.
Tiller - buckets and buckets full of rocks in the FEL - or do you guys just leave or carry the rocks?
Box Blade - Buckets and buckets of rocks and materials.
Hog - The FEL is your early warning system as well brush guard.
Mowing tall grass - early warning system.
Stump grinder - clean up all the mess.
Add to that that the FEL is no longer "just a bucket" with SSQA.
For me,
Bucket
Grapple
Hydraulic post hole digger
Hydraulic cement mixer
Power angle snow plow
Snow Box
Forks
etc. etc. etc.
The FEL isn't just for breakfast anymore.