In-law competition????

Does anyone have any in-laws that seem to compete with them about the things they have? I have a brother-in-law that ALWAYS buys something right after we buy something and it's getting on our nerves. We bought a big screen tv a few years back and 2 weeks later he bought the same one. Now we bought a Plasma tv, he's just metioned he wants one now. We bought our truck, guess what he's got one now...the list goes on..it's seems like he's competeing with his brother if he can get one so can I. We are in no way in competition with anyone of his family members and the things we have we have worked very hard for them and appreciate them. We are also happy when another family member buys something nice for themselves and don't feel we have to run out and buy one too,it's silly. Can anyone relate to this and how do you handle it?