MAY I SUGGEST. Standard web etiquette.
If you're selling something, rules are first open thread "I'll take it" with payment is SPF.
Until than, its available.
Wanting to buy, respond to thread with "I'll take it" and payment arrangements.
Deal falls through, next responder has first right of refusal.
That way no one gets their feather ruffled and we all stay friends.
OK?
Larry