Comments: Used to be the gold-standard for reenacitng uniforms and equipment, but that's changed in the last few years. I don't know what the owner is doing or why he's doing it, but he's ruining ATF's long-running reputation IMHO. More and more, they price gouge you for items that should cost a fraction of what they charge. The owner likes to crowd-source information on social media then bad-mouth the comments he received in his weekly emails. ATF used to be all about accuracy, now they seem to be more interested in selling inaccurate WWII reproduction items to idiots who want to wear it as daily streetwear. I don't like the direction the owner is taking the business. I'm sure for a while you can still get good stuff from here, but personally, I'm not recommending ATF to recruits any longer.
Comments: Large selection at competitive prices. Beware that website reviews are cherry-picked and any criticism is deleted. I left a negative review of an item. Not only was the review deleted, my account was deleted. So the owner is makes sketchy decisions and their customer service has rarely been good to me. They do have some other good things - their uniforms (while Chinese) are good enough quality and are sold at a good price.
Your local pawn shop, gun store or gun show can also be good places to find WWII-era weapons and equipment.
Nowadays, gun shows are going to be your best bet for finding a K98 rifle. Unfortunately, only so many K98s exist. None are being made, so prices will continue to increase by the day, and will never come back down.