The market for the air-cooled 911's will continue to rise, along with certain other early cars, maybe a little slower rise in the near future, but the long term trend will be higher. The ones that have been heavily modified will not keep pace, most folks with the $$$ to be in this marker are looking for mostly or all original 993's, 964's and G model 911's. The early ones have gone crazy high and are likely just getting passed from collector to collector. The 928's and 944 and 968 seem to be up and rising also. Of course, only Tabs can really answer this
