These are great prices, unfortunately this isn't the case anymore, seems to be getting worst every year. Was this at SGV?
A couple years ago I was lucky enough to find an instructor that I have been able to learn from regularly. One piece of advice he gave me early on, was to stop buying the cheaper material and save for nicer starts. If I needed material to work or practice on I could always use his. This has enabled me to slow down my purchasing quite a bit. I have bought several pre bonsai in the $500 range, and recently made my first 1k purchase.