People and interests change. I didn't feel guilty buying r/c models for two decades, but when my interests changed I did feel guilty having all that money invested in stuff I wasn't using - so I sold it all off and bought guns! OTOH, if I decided I wanted a non-firearm-related luxury item today, I wouldn't feel guilty buying it. I'm currently keeping an eye out for a bargain on a plasma cutter and a midsized milling machine. Recently bought the wife a new Sequoia Limited 4x4, no guilt or buyer's remorse!