Not having run in that long, there going to be quite a bit of "going over" that it needs prior to competition. Then add in the cage updates (passenger door bar), additional ballast, new belts, new tires, possibly updated fire system, etc and there ends up being a not insubstantial amount of work needed. I've seen very well prepped and currently competition ready ITA CRX's go for less than $4-5k recently. What you're describing is worth at most the $2,500 mentioned above and potentially quite a bit less depending on what parts are on the car, spares package, and overall car condition.