Larry. There are two prices for just about everything. Farang price (you) and Thai price (wife or girlfriend) so use a Thai girlfriend for any negotiation you have. We are Bangkok people and my inquiry got an answer if 15,000 baht. Later in the week my Thai wife got a quote of 9,000 baht for the same unit.
It’s possible but most of the time we pick up our large 50 pound bags (4) that my Thai wife packed and we head directly outside to the van we hired. No customs check. I think it’s because they get X-rayed getting on the plane, checked again in Taiwan and simply not important in Thailand. Even going back to LAX thru Tokyo or this last trip Taiwan US customs just asks a couple questions and rarely do they open any bags. Maybe because we’re retired….lol..