Without a doubt this class of domain is heating up - however, the heavy heavy gains are with CVCV domains. Yerm.com is good, but may also be confused for Yurm.com (as they both sound the same).
Reseller wise, I would expect to fetch a minimum of several hundred dollars (3-400) but I agree, you'll find this domain class is getting good attention and should start to rise fast - I would estimate you'll see a nice return on your investment in the higher xxx range (6-750)
Justin