Raced a Caterham for 6 years. It is a tried and tested product and holds it value. In racing I’ve seen many big accidents and they are remarkably strong. I wouldn’t trust any other 7 replica to do the same.
I got back what I paid for mine. Other 7 type replicas are built to a lower cost and are heavier and do not hold value. My view would be take a loan and buy one. Enjoy and then sell on.
BTW I don’t know why anyone would buy one and not do track days etc. IMHO its a pointless format for the road, they are just too quick/uncomfortable to enjoy safely and at legal speed limits.