formula for R22
Hello CF.
The first question to answer is
"are you buying or selling"? Values will vary enormously.
Second, the timed out value of a R22 will be somewhere between 12k and 20k. Condition, model, age, number of re-builds, out of phase parts, location, will all influence how much you get or how much you pay.
Third, the depreciation from new price to core value over 12 years or 2,200 hours (whichever arrived first) is by no mean a straight line. A mid-life R22 will be valued at somewhere between 50k and 70k, but a mid-yeared R22 with just 600 hours to run will also be worth this kind of money. A R22 with 1500 hours and 8 years to go will only be valued at about 10k more.
You might be able to find a R22 with 2 years and 300 hours to go, and this can be worth as little as 20k and as much as 40k.
Forth, the value of the GBP to the USD massively influences the viability of doing a re-build. So this means that sometimes schools, engineers and owners want to get a hull re-built and at at other times they want to get rid and buy a different one.
So I suppose the short answer to your question is "No", there is no hard and fast formula anymore, there are many factors to take into consideration.
Hope this is not unhelpful??!!
And if you want any more help in buying or selling, just PM me.
Big Ls.