Tube Chassis Help

I have never had a tube chassis car, so I can't give and estimate on value. But I can make a sugestion. If you have a way to transport the chassis, take it to a chassis shop or race track, and have it inspected, to see if it meets current rules/specs. If not try to get an idea what it would cost to upgrade.
One time I found a back motor dragster chassis for sale at a bargain price, but knew it didn't meet current rules. Where I was lucky, the chassis had a manufacturer sticker with serial number. I called the manufacturer and got a estimate on cost to upgrade, and it was reasonable. However as the saying goes, "you snooze, you lose". Someone else beat me to it.