02-12-2013, 10:32 AM
They say you need at least $10k to swap one into a miata or E36, I would assume roughly the same thing for an E39. You could probably get a donor car for $3-4k, and then you'd drop another $5k or so on wheels, suspensions, bushings, and nice cosmetic bits, because the 525i non-sport you used for a donor would definitely not look like one of those things on the previous page.
Now: 07 Porsche Cayman S | 18 VW Tiguan
Then: 18 VW GTI Autobahn | 95 BMW M3 | 15 VW GTI SE | 12 Kia Optima SX | 2009 VW GTI | 00 BMW 540i Sport | 90 Mazda Miata | 94 Yamaha FZR600R | 1993 Suzuki GS500E | 2003 BMW 325i | 95 Saab 900S