I think that 50 mush for a mela is outrageously cheap, as I just sold a 6G CL one for 850.
I think that honestly, what I've noticed, is that if a wolf is 1-6G it is worth considerably more then 10G+. Inbreeding is a completely player made idea, but is really most players' main concern unfortunately. HW (Heavy Weight) is also important, and vitals/stats to. The ideal wolf in my opinion would be-
+40+ Rarity
+Female
+2G
+No negative vitals
+EEO (Excellent, excellent, obedient) stats
+Divine Health
+Pelt Defect
I personally would pay 5+ apples for a wolf like this.
Generally, males are given a bit of a harder time then females, you might be able to sell your 35R female for 50 mush, but her brother for only 5-10. Mainly because there are so many high R studs out there, no one really needs their dud brothers.
I normally sell pups under 30 rarity for 5 mush unless they have a pelt defect, DH boost, or SV boost. You really cant get more then that unless you find just the right person to buy them.
I hope that helped a bit ^^