In reply to blondel:
oh yes, its gotta be signed.
belive it or not i actually follow the art world a little, and if adam turns out a few more - a series say - to create a body of work, then its easier to push the prices.
then, say, several people syndicated and bought most of them, then sold them amongst themselves for a few years, the value will rise. even better if some are publicly exhibited and/or auctioned.
always best to keep one or two off market - always need the allusion of 'more out there' as it helps forge demand for collectors. eventuallly release the lot, to be sold as a series, and then broken up again to restart the process.
definitely dont frame it, but signature is vital.