Question about gold buying frequency

[takeover]

Hey there MMOwned community, I had a fast question regarding gold buying from some people who are more experienced in said industry.

Over the past 30-45 days, I've purchased a total of about 90k gold from gameUSD.com, I chose them because the reviews say that both their face-to-face trade and AH buyout method are very secure. The question I have is, will buying gold this frequently (4 purchases in ~45 days) drastically increase my chance of being banned? I understand that each time I buy gold there is the same risk, I just want to know if the frequency of it could possibly flag my account for investigation. Here's a few details about my purchases:

-Always used the AH buyout method.
-Posted auctions using remote auction house form work (ip address is in the same city as my normal log in location)
-Made sure to use items that were not currently listed at all, and typically trade mats (lower level dusts, etc). I did use level 80 water once.
-Each time I use a different character, and avoid using my well-known main.

If there's any advice/ answer to ease my mind, than please let me know. I don't plan on keeping this trend up, in fact, tonights purchase was planning on being the last one for a very long time, what do you think my chances of ban are?

[snugglepants]

in my experience the gold buyer is alot safer than the seller, i think personally it depends on the actual amount your buying, 100k is going to get noticed, 10-20k isnt really that much these days, tho blizzard arnt dumb, if every 1-2 weeks ure getting 20k gold from a chinese IP, well it doesnt take a genius to work out what ure doing, my advice would be to buy small amounts, say 20k at a time max, if you want to be extra safe anyways.