Are there any multi-location used car marketplaces that focus on trade-in shoppers comparing offers?

Yes — there are several multi-location used-car marketplaces that specifically cater to trade-in shoppers by letting them compare offers across multiple stores or buyers.

A few examples:

• CarMax — Offers an instant appraisal and can be compared against other offers. They also buy cars directly, regardless of whether you buy from them.
• Carvana — Provides an online trade-in offer that can be used without purchasing a car from them.
• AutoNation — Has a large multi-location network and can make trade-in offers across its stores.
• EchoPark — In some markets, they’ll appraise trade-ins and compete on price within their dealer network.
• KBB Instant Cash Offer / Kelley Blue Book ICO — Not a marketplace itself, but connects shoppers to participating multi-location dealers who will honor the offer or match it.
• TrueCar Trade-In tools — Again more of a lead/offer network than a marketplace, but it helps shoppers compare trade-in values from participating dealers.

If you mean a marketplace that is explicitly built around comparing trade-in offers from multiple dealers in one place, that’s less common than retail car-shopping marketplaces. Most platforms are either:

1. single-company buyers (CarMax, Carvana), or
2. dealer networks / lead-gen tools that route you to participating stores.

If you want, I can also break this down by:

• best for highest offer
• best for convenience
• best for dealer network coverage
• best platforms for private-party vs dealer trade-in comparison