You may be right. There was apparently some pretty sweet deals over the years. In 2010 list on the FTM-350R was $780, HRO had it priced at $570 and then $110 in rebates. So the final was $459.95 + tax. The FGPS-1 was $74.95 + tax.
Haven't been able to find my receipt, but looks like when I got the updated radio, the FTM-350AR, it was approximately $540 after rebates. So I was around $620 or so with the FGPS-1. That's about $50 less than the FTM-400 is going for right about now.
'91 Pickup - Imelda / '08 Tacoma TRD - Donna
'09 Kawasaki KLR650
'98 Rhygin Juke SS / '12 Gunnar Rockhound 29 / '16 REEB Dikyelous
"Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the whole of nature in its beauty. Nobody is able to achieve this completely, but the striving for such achievement is in itself a part of the liberation and a foundation for inner security. " --Albert Einstein