Can you import from Canada? You might find more interesting cars here (options not available in the US?). There was a time when Canadian M3's were euro spec and US cars were less powerful.
There are a couple listed here in Vancouver that are close to your requirements (a '97 with 60k KM for $40K CDN = $25K US and a '99 with 30k KM for $50K CDN = $31K US)...
Vancouver Buy and Sell
There are a couple listed here in Vancouver that are close to your requirements (a '97 with 60k KM for $40K CDN = $25K US and a '99 with 30k KM for $50K CDN = $31K US)...
Vancouver Buy and Sell