Naps: Exersaucer

Exersaucer for 6 Month Old

Did you buy an exersaucer for your baby? I keep hearing how great they are but they're not cheap and so far I haven't had luck finding one on Craigslist. I don't want to get caught up in the baby industry and spend tons of money unnecessarily, but I keep hearing that exersaucers are great for this age. Do you/did you own one and did you find it useful? At the moment, we put our baby in her bouncy seat, on the bed, bumbo seat (which I don't find useful at all), or on the floor on a mat. Someone let us borrow a jumparoo but we haven't used...