Question on used Suns

[Carl Mercer]

I've got a question.  In looking through UnixWorld a few days ago I
noticed an ad for a company named "Minicomputer Exchange".  This company
buys and sells Sun computers.  The Idea of buying a used Sun intrigues me.
My question is has anyone dealt with this company recently, and if so are
they reputable?  I've talked with a salesman who seemed to knowledgeable
but thats alot of money to send on blind faith. 

I'd greatly appreciate any responses on this company, other similar
companies, or opinions on different approaches I should take.