My 2004 has 43k miles, but I want side airbags

Just got a 2004 Prius with 43,500 miles from my grandmother, who at 98 no longer drives (and from 88 to 96 drove very little). I'd really appreciate any advice about what my options are for trading/selling it for a Prius with side airbags (presumably any 2007+, or perhaps a 2004-2006 model where that option was selected?).

As a reference, Kelly Blue Book lists the following values for my Prius with its mileage and specs in good condition in my area (LA):

• Trade-in range: 5,718-6,983
• Trade-in value: 6,351
• Private party value: 7,276
• Suggested retail: 9,680
• Fair purchase price: 9,380

As an example, KBB lists a 2007 Prius with 103,000 miles at the following similar (some higher, some lower) values:

• Fair market range: 6,912-9,329
• Private party value: 6,003
• Suggested retail: 8,521
• Fair purchase price: 8,121

So hypothetically, if I could break even going from a 43k 2004 to a 103k 2007, would it be worth it? Am I even going about this question in the right way? I'm totally new to car ownership/buying/selling/trading (grew up carless in NYC, got my license last year at 26), so any thoughts would be sincerely appreciated and helpful!

 

Do you think I could sell it for more than KBB's valuation? I don't see any listings online for 04-07 Prii with less than 80,000 miles, and most have 150-300,000! How can I get a proper sense of what someone would pay for my possible "collector item"?

(And yes indeed, it has been fully serviced and spent the vast majority of its days in a closed garage. Drives like a charm, only blemishes are some paint scratches here and there.)

Thanks again!