Mate, without even looking at your ad, to claim something is "new", but has had 100+ bb's through it, & more importantly, has absolutely no warranty is horseshit.
As for the price, as long as I've been playing, around 24 years, secondhand sales have always been priced at between 60-75% of the cheapest readily available rrp (depending on certain factors), where does yours come in those parameters ?.
As for ending up on macks, this is, & always was, the only forum that allows members to critique prices (from any source), its not a personal attack on the sellers themselves usually, just on what people unrealistically believe their items are worth.
Sometimes its a lighthearted giggle, but sometimes its also an exercise in preventing less knowledgeable people getting turned over, which to be fair, should be welcomed.
Welcome to the forum 😉