Forgot to mention, I spun off into a more general project along these lines, that was easier to vibe code (especially since bottle deposit states don't all have APIs for GitHub Actions to grab their current per-pound rates):
BTC2Free
People donate Bitcoin.
Participants offer items on Freecycle in return.
Also, what I've been doing is pinning posts that I GPG-clearsigned with my Bitcoin-OTC WoT key, containing the same address I put on BTC2Free, on my Nostr (npub19ctmsmtf9jtehddhctwmnacwqtnkh0p43tafttrgzdgy0wlppcpq50zf83), eg.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
#BTC2Free
Send
https://preev.com/btc/usd?usd=78 to
bitcoin:bc1q4xs2vezxa946gcxrmptfe8hquu99wmp8uanst0& I'll give away
* 96 gallon capacity Toter wheelie bin
Cracked near the wheel so slightly that I missed it the first few times I looked for damage; but in better condition than most used bins I've seen. Also, has address painted on the side.
* ~22.45 lbs of bagged CRV (PET #1) inside the Toter Bin.
Those PET #1 CRV containers are in plastic bags, which is why that weight is approximate.
* 7.325 lbs of bagged PET #1 outside the bin (contained elsewhere) that won't fit.
These bags' weight excluded.
* $4.35 worth (by count) of mixed material CRV containers
* 1 nickel, 3 pennies
to a random on Freecycle San Diego (currently 10,967 members).
bitcoin-otc.com/viewratingdetail.php?nick=TheButterZone
-----BEGIN PGP SIGNATURE-----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=MAtu
-----END PGP SIGNATURE-----
So that's a specific commitment to [receive specified amount to their BTC2Free profile address]->[post exact offer on Freecycle] that anyone can make anywhere they can post ads, then if they're successful, comment the proof of giveaway on their BTC2Free issue.