Here is the manufacturer's website:
http://nustylequilting.webs.com/quiltingmachines.htm
Call them and see what they suggest. If it looks anything like the machines they are setting up now, yes you can just take the machine and dump the frame. It is also possible that the frame it currently is being sold with is not the original. Can someone send you some pictures so you know?
Unless this is a super good deal & this is one of the more modern machines that Nustyle is selling & servicing now--I wouldn't be putting in for a vacation day. Some of the first Nustyle machines were iron monsters with the oil drip pan below.