Yeah, that's a Spruce Hollowbody, essentially the same as mine (I have a 2006), except you have birds. I can't make out the serial number on that one shot, but it won't be any more recent than 2007-ish.
$1800 is a fair price if it had the case, IMHO, but without the case I would want a lower price. The Spruce HBs are not common in the market place, so their track record is all over the place, but _generally_ they go for a little less than the HB I or HB II equivalents.
With piezo and birds that adds about $300 or so to the model you have, and prices have certainly changed (gone up) since 2010 (that's four years!). I assume your guitar came with a case for the price you paid back then.
That case is clearly a sticking point for me. The HB really needs the added protection of a good hard shell case, and that one fits like a glove...
I dunno, I'd be interested to find out why no case - it is useless for anything but another PRS HB, AFAIK.