I'm starting this thread because my hobby is buying musical instruments. So I know what it's like when you see an instrument you really want to own (even if it's say, almost the same as a horn you already have).
Over the years, I suppose I've given myself a spectacular range of reasons why I bought a particular instrument. My wife isn't greatly fooled by this, but as long as I sell enough instruments to make this act of delusion self-sustaining, she lets me get on with it.
Here are some of my reasons for buying: (Please add your own!)
I couldn't believe it was about to go for so little on ebay
I was in Cash Converters (insert name of other pawn shop) and they obviously didn't know what this was
This makes a perfect pair to my cornet/trumpet
Ernie Sondgrass used to play one of these
I've never seen one in silver plate before
I've always wanted one of these because...
This was going cheap because it's bit tatty but with a little bit of TLC...