2003 BMW 525i sport package with 87,450 miles, what will value be for the vehicle.

I scrolled through the listings here in used cars, and just for example, this 2003 525i with 92,000 miles is listed at $11,500 but CarGurus calls it overpriced and gives it an Instant market value of $9,995. Private Party. The Dealers are listing them for around $10,500 to $11,500 with that mileage area, They seem to drastically begin to drop in value at the 100,000 mile mark all the way down to $5k to $6k

David is spot on here. I bought my 01 E39 Sportwagen with a manual some 10 years ago for $17000, well under book value. Now, with just 102K on the odometer, I am looking at a private party value of $4800-6500, vs. retail of $8900! What is comes down to its that the E39's have plenty of maintenance come due at 100K service time. Many owners and dealers are looking to avoid that scenario all together, because it will fall on someone's shoulders. Don't forget, dealerships buy at wholesale, if not at auction or below value, and charge the Hell out of the buyer. Negotiate for what you believe to be a fair price.