You can do a search in the archives for other threads on the relative value of a Cub. Suffice to say a Cub's value is determined by a few factors
1. Location
2. Condition
3. Implements & Attachments
4. Availabiltiy
5. Desirability
6. PO's wishes/wants ... this is Present Owner and of course the Prospective Owner.
With that said, the majority of Cubs with a mower are worth between $1,000.00 and $2,000.00 .... so based on what you have said, probably in the higher bracket.. say $1,500.00 or so.. that is a qualified guess since there is no pic.