Spent more than $1000 on a Canon 40D about 14 years ago. Got an error code ERR99. Decided to drop Canon, and sold a few of my Canon lenses. Bought this 30D for $40 a month ago (thanks to the seller), and start using it with lenses (such as EF 28-135mm f3.5-5.6 IS) remained. Results are acceptable. ERR99 is still haunting me.