Has not happened to me as far as I know. I suppose it's possible that a 2-3 day delay from order to shipping means the product wasn't in stock but it could also mean that is just how long it takes to get stuff processed, picked and shipped.
Also, I have had credit cards compromised twice after purchasing from the same CGN dealer (Not Tenda) They are a very well respected dealer on CGN, been around here for a very long time. The two incidences happened about 6-7 months apart and I only picked up on it as I reviewed statements from the past. I didn't go on their forum and blast them because I understand that credit card fraud is common these days and anyone and any business can be targeted.
375 Ruger is the NEW KING of the .375's. ALL HAIL THE NEW KING!
I ordered a CZ 527 and asked for one with a hand-picked tiger-stripe grain. They found one and charged me top dollar for it, which I was happy to pay.
Then when I went to pick it up they said they sold it to some guy named Hitzy. Never again.
I've had my issues with Tenda. Pay and wait 2 weeks to ship then get a refund after they've sold out. I bought a grade-A - Milsurp and got Bobby Hulls slap shot practice stick. There was a third but I can't remember it offhand
I have also had other various purchases off them that were positive, fast, and friendly concerning NEW firearms and ammo. Never buying Milsurp again. Can't say I won't use them again because a deals a deal.
But it's been almost 2 years since I've used them.