I used to work for a company that sold/leased refurbished POS equipment (hypercom, verifone etc) so I linked POS to Point of Sale first

... THEN my mind went to the 2nd option
Are you looking for PC solution or are you looking for credit card machines, check reader etc, and cash register software?
Usually if you want the actual equipment you can go through your bank but beware they're gonna charge you an arm and a leg for rental/lease fees and usually a nice fat contract for a year or so.