No no I totally understand. no matter how you look at it $87 is still $87. Well, what are you looking to pay? I know that sounds a little backasswards in a sale, but I'm trying to help. Or maybe you have some not so expensive gear you don't need and are willing to trade.
May seem old school but if they need mapping the AMA or your local equivalent used to provide such free if you gave them a route etc.......I assume same or v. similar still exists. That and a $2 dash compass ball should pull it off.
Not a US company but today a coworker picked up a small GPS/mapper for $50 from londondrugs.ca he's mounting on his motorbike. Maybe same brand's in US.