Be aware that "antique" instruments, apart from those in mint condition, can require considerable maintence, especially for young people heading off to that camp in the arid Rockies or that humid one in upstate New York. (Our daughter returned from Meadowmount with every seam open on her 1905 violin--and old cellos seem even more sensitive). And then there's winter--which, as a Minnesotan, you know about ....and summer....
And it seems the bigger the instrument, the more likely it is to suffer physically inflicted damages. My sister beqeathed her cello-playing niece with the "gift" (curse) of her 150 year old cello (not a valuable thing) that arrived from Hawaii as a cello kit and required a year of resoration and many pots of glue. It has always been a money pit.
Add to that the cost of travel with a cello. Earlier in its life, that old cello was crushed by baggage handlers when my sister went on tour in Europe. So you either buy a second seat on the plane, or you trust your good fortune and pray a lot.
These realities deserve to be considered when making a significant investment in an "antique" instrument.