Well personally I think that the Dot represents the "domains" here and DotStock comes out as a pretty good name for domain stock market or something very brandable that could be used in the domain name industry.
I will be developing this domain therefore monetary price valuations are not that important for me however considering the fact that this domain was taken in all major extensions(.com, .net, .org) including its' version with the (s), I would be inclined to think that this name would be worth more then a regular registration fee considering its' brandibility and development potential.
Thanks for all the appraisals. Very much appreciated.
Regards,
NW