Hmm what OS are you trying to use on it?
I dont know what the value would be on the SPARC, but its a great machine, its a pity that you have decided to part with it.
BTW: check out
www.nudata.com and its catalog to see if there are any products that will allow u to use your sparc monitor.
Or call the folks here:
www.ultraspec.com and they will tell u about cabling options for using the MC36 monitors on PCs