HELP! I need tires for my '87 535i BMW....who knows where to find a tire for less than $400.00 each? My current tires are 220/55R 390
I am told they are discontinued and now cost a bunch. What do you know?

Yeah bud, you have the stock Metric rims and tires. You can replace those rims and tires with a good used set for $300-$500 with rims and tires. Check out your local craigslist, and MYE28.com You can fit 15" or 16" wheels. You are looking for 5x120 bolt pattern, and most 5,6,7,8 series wheels will work.