Back in the early 2000’s I got to do Acrobatic Training in a Super Decathlon at KPRC Prescott AZ. This aircraft is one of the best entries into Acrobatics & Tail Wheels, gaining more confidence and capability as a pilot.

The Decathlon started Production in 1972 and is a derivative of a Citabria.

Prices range from 50 to over 200K depending on year, condition etc.

https://en.wikipedia.org/wiki/American_Champion_Decathlon

There are some RC Options available. Great Planes made a 64″ kit that you may be able to find on eBay or a large hobby shop like Graves in Orlando FL. Outerzone has the plans for it at:

https://outerzone.co.uk/plan_details.asp?ID=10203