Well Amigakit is probably the most active dealer in the world. I have to say Vesalia is very pro and reliable as well. However, if you are in the usa watch out for amigakit as they have a "us site" but no us location. So all gear ships from uk. I had an order with them for a few items one being an important replacement drive and it over 6 weeks for delivery!
I live in the US, and I have ordered several times from Amigakit and have received my items in less than 9 business days after ordering. That is truly amazing given it is coming from outside the US and it has to get thru US Customs. If you live in the US I would not worry about watching out for Amigakit as they are very good people and getting your paid items to you is very important to them. No, this was not a paid endorsement by Amigakit just a past customer who likes to support companies who support me and my hobbies. Thanks Amigakit!!!:)
The Dawg