New Scam ...or Old Trick Domain Names on Offer

I was approached, by email, a while ago by a website offering me a .com domain of the domain name I own a .org of .. is that clear? They said that for the sum of $99.95 they would sell me that .com domain name. Well I did not have $99.95, so although I sort of would like to obtain the .com domain it was just not an option at the time. THEN a short while later I received a follow up email saying that they would be prepared to drop the price to $49.95, would I not be interested then? Well I was still sort of interested but I did not have $49.95 so I again ignored them. I did take a cursory glance at their website, and maybe that is what encouraged them to contact me the second time.
So then a few days ago out of pure idol curiousity I looked up the domain name in the 1and1 domain name search and found to my surprise that the .com domain name was now available for $8.99, so I bought it!
Just wondering if anyone else has had something like this happen and what is the best approach, if I had had the money I may well have bought the domain name when it was first offered, but obviously they where trying it on.