If I was buying a new radio I'd go with 2.4ghz. To be honest I wouldn't buy a used or new 72mhz system. At my flying field we have a problem at times with 72mhz radios getting hit. I’ve also been to several flying events and have seen people get hit by people who either didn’t impound their radio or the impound made a mistake. In my opinion you would be better off going with the new technology and almost eliminating some of the weaker points 72mhz has.

Really it just comes down to “what’s your investment and time worth?” Is it worth the risk spending the price of the kit plus forty to several hundred hours building a plane to save roughly sixty dollars? If it is then by all means go the cheapest route you can. Speaking for myself I’d rather sit on the ground for an extra week or two until I could afford the 2.4 system. For years 72mhz systems were the best we had now we have a choice of a system that is much better. Who knows several years from now we might have a system that’s a huge improvement over 2.4.