Greenline is alright. I've made 6-7 orders and most of them have been prompt delivery in the 1-2 week timeframe. My last order took longer than usual (4 weeks) and I was a little worried, but it came through finally and had some nice freebies that were totally unexpected and I'm very appreciative of.
Maybe when it takes a little while for him to ship, he could just be super busy. I imagine all these domestic banks are swamped with orders daily. He probably is just a one man show taking care of business the best he can. I say just be patient and if you message him be polite.
I like this vendor and he has some sweet deals, he may be slow to ship sometimes, but definitely trustworthy.