I'd keep the XR to if I were you Steve.
The bike shop here in Gladstone have just moved into bigger & better premises next door. The owner Rob now has a section to display his own bikes some being a one of a few road register able CR 500, never ridden still has a plastic cover on the seat, fully restored old XT500 ( chrome/silver tank ), and an TT500 sat next to it of the same era. All going up in value needless to say.