I saw a MXT 300 for sale with a whites bullseye II and a gps (not sure why this is included) for $600 and was wondering if this price was an acceptable price for an MXT 300. I have been wanting to join this forum for a while and they are saying this machine is in almost new condition. Any advice on this would be appreciated.

well, if you need one. The pinpointer is also a nice addition, usually available (used) for 40-50 bucks.