Resurrecting my alpenrost: need some green!

I have an alpenrost roaster at home, haven't used it in a few years as I thought it always under roasted, even on the longest settings. Anyway, I have now found out that other people had this problem, and it is fixable! Have to dismantle the machine and adjust a resistor, I am quite happy to do that.

Also, last week I found a shop selling roasted single origin beans, bought some Yirgacheffe and some Sumatran, paid about €13 for 200g in total, which I thought was rather expensive. The coffee wasn't brilliant (as fresh roasted coffee should be) but it wasn't undrinkable, and it has rekindled my interest in home roasting.

I used to get green beans from ongebrand in Holland, but I see that most of you get your beans from HasBean. Any reason for this? Prices seem comparable. Are there any other good places to get green? When I lived in England, I got beans from Hill and Valley coffee, but the postage to Ireland was far too much.