Many reputable vendors and ebay sellers have come and gone over the years, but I'd like this thread to establish a listing of the more "permanent" merchants who have been selling TG-16 / PC-Engine / PC-FX items on a regular basis for at least a year.
I mainly purchase PCE stuff, so... Below, I have listed the vendors who I've purchased 30+ items from, over countless individual transactions, over the past few years. ALL are highly recommended. Also, in case you were interested, I've purchased many MegaCD, Saturn, Famicom, Super Famicom, etc. items from these vendors as well.
The West Exit -- Dedicated website (and ebay occasionally). Very good prices on most things, though the popular / highly sought after titles are on par with average ebay price. West Exit used to stock a much larger inventory, so it is a bit leaner now. Excellent communication and service. Items tend to be in "good" condition, so if you are a collector who wants minty fresh merchandise, be sure to inquire first. This vendor also sells on ebay (U.S. based).
Wolfgames -- well, this site won't be around much longer... only a handful of PC-Engine items are left. Nearly everything is 50% off. This was one of the more expensive venues, but the communication and service was excellent. Items tended to be in very good condition, but inquire first.
Mad Gear / 16-bit -- Ebay only. Sometimes you can pick up a sweet deal, but prices tend to be on the high end... however, if an item doesn't sell initially, he will usually lower the price for the next round. ABSOLUTELY EXCELLENT SERVICE, PRODUCT and COMMUNICATION. Over the years, I've seen many good sellers come and go, but this fellow has remained and is as reliable as ever. Highly recommended. Based in the U.S., 16-bit tends to stock items that are in very, very good condition (except for the loose famicom carts). If you want minty fresh, he's your man. If you have a limited budget, you will find his prices TOO HIGH.
Hit-Japan -- Ebay only. Based in Japan, this is a very reliable seller. You will only get your money's worth if you buy a bunch of titles at once. Overall, decent prices -- even when you average out the shipping costs (assuming you buy 5+ games): the best scenario is to find 1-2 titles that U.S. sellers really gouge you on... then pick up a few more games to spread out the cost of shipping. When he lists the quality of games, he tends to classify most items as a "B"... just be forewarned that although a "B" will be in decent shape, it will likely show signs of wear and will not feel minty fresh.
Turbo Zone Direct -- Still around, still excellent service. You won't necessarily find the lowest prices here, but considering you're getting *verifiable* brand new merchandise, this is still a wonderful resource.
NOTE: TZD is the only TG-16 merchant on my list because I simply haven't purchased many TG-16 items off of ebay (no need to
, thankfully!), so if there are long-standing, reliable sellers of domestic software/hardware, I'd love to hear it about them. Please indicate how long you've been dealing with them and some measure of frequency (i.e. a rough estimate of the number of individual transactions and total products purchased... this really helps capture a better picture of a merchant).