I got to Barville a fair amount, not far from us. Haven’t been recently so can’t comment on the “buy-pack”. Not even sure what is meant by “their own tack”.
The majority of the English tack they offer is not made by them. They cater to the harness needs of the Amish.
I’ve never seen much in the way of used bridles, halters etc they have on offer and worth the money. It looks like a lot of the stuff was brought in for repair and never picked up.
They usually have a lot of used saddles for sale. Most are on consignment. Most IMO are overpriced. I have made some offers on a few. They call the owner and get a yes or no. Generally I get no. A few months later the saddles are still there price reduced to less than what I offered.