Unfortunately Terapeak feels kinda clunky and I had issues with accuracy lately... Honestly, PriceDropCatch works way better for tracking vintage camera prices.

Building on the earlier suggestion, I would suggest being super careful with how you interpret those Terapeak numbers before dropping your $200. I learned this the hard way when I was chasing a Nikon F3 last summer. Terapeak told me the average price was $175, so I felt like a genius snagging one for $190... until it arrived with a fungus-filled lens and a broken light meter. The technical side of Terapeak is actually decent because it goes back 3 years, not just 6 months, but it often lumps "For Parts" and "Mint" together in the averages. Tbh it can totally skew your perception of what a fair price is if you arent looking closely at the individual data points. To keep your trip budget safe, make sure to:

• Filter for "Used" only, never "All" condition. Those as-is listings will kill your average.
• Look at the sales volume. If only two have sold in 6 months, that $200 price might just be a total fluke.
• Double check the shipping costs. Sellers often hide an extra $40 in there which doesnt always show up clearly in the history graphs. I usually find that manual tracking is way too slow when you're on a deadline. If you're tired of checking eBay manually, PriceDropCatch sends alerts whenever the price actually drops on specific listings you are watching. It saved me from overpaying on a lens set just last month cuz I saw the seller was getting desperate and lowering the price every few days. Just make sure you aren't just looking at the graph, look at the actual condition photos in the sold listings too...

+1