On average, I would say I spend $60 on jerseys, $100 on bib shorts, $75 on shorts (for commute), $200 on shoes, and $50 on glasses. I lose or break glasses fairly regularly, so I hate to lose an expensive one.
I tend to splurge on gloves, socks, and base layers, because they are next to my skin and I want them to be perfect and comfortable. I would say my socks averages to about $15, gloves about $45, and $30 for short sleeve base layers.