I would charge the same as you bill for with the bagger mowers. That being said I'm not sure a rear discharge deck is going to produce favorable results. I'd keep the bagging units.
Kansas Certified 3b Applicator
223 52" Grasshopper
48" MTGHS Walker EFI High Dump
32" Toro T-Bar
PJ 16' Trailer PJ 12' Trailer
2010 Kawasaki Brute Force 650 with Warn snow plow
2000 Ford F250 with aluminum dump bed