Dymags are pretty much worth their weight in gold as they are very light. You should charge by the Oz for a Dymag

. 7K is alot of money for wheels but where do you get another set if you want them? They are definatly worth about 1000 per wheel on a fire sale in the worst case senario. I have been offered darn near the price of a nice used corvette for a set of the rare ZR1 dymags I have on one of my cars. I still have them and will keep them along with the 3 sets on my other cars. I will also buy any Dymag I can get my hands on in the less than 1K per wheel price range, if I should be lucky to find them for that. If I needed one, I would pay even more, but for now I have enough.
The good news is that if Callaway parts are going up, then hopfully the cars will follow as they should. Just as an analogy, if a sort of rare marginal surface job restoration 69 camaro is worth 50K, what is a mega rare factory Callaway B2K with low miles in 100% perfect original condition going to be worth when its about 40 years old? If a nice original Callaway B2K is not worth at least 125K-200K around the year 2025, then there is something seriously wrong with people in the car hobby. With the heavy inflation we are going to get, the prices will probably be even higher than I am speculating as everything is going to get REAL expensive. A classic car, real estate and other things like that are the only protection your money will have from it.
The other good thing about a Callaway is the fact it would take an act of god to clone one.... Anyone that can decently restore a car can easily clone a big block camaro and a big block vette out of 327 car and sell it to you all documented original, but still a fake. There are more 1967 427/435 corvettes on the planet today than there ever were in 1967.
If you have a love for cars and some spare cash, buy as many factory B2K Callaways as you can get. Dymags too! Its probably better than any retirement plan you can ever put together and not as risky as the stock market.
Just my financial opinion. I wish I just had more space and more cash to buy more Callaways!