Hi I would like advice how to buy - domains, service, sites, scripts, from people I do not know. like people who post on message board. what is the best and safety way to buy from people you do not know? Is it a good idea to tell them to post on eBay and if the have a positive feedback that will tell you that the person is honest. So what is your way with your experience?
You never can tell. For high ticket items, go for escrow service. For low ticket items, count the risk ratio into the price.... Generally on boards like this, if you are dealing with someone who is a member for a longer time, has plenty of good feedback, and maybe even some iTrader rating, you are on a safer side.
Well, even if it's just an online transaction you are into, you can still ask for a person's background or credibility from other webmasters.