Expobars are priced at the cheap end of the spectrum. Frankly, I havent heard many positive things about commercial expobars doing decent volumes. If you are buying second-hand, its probably worth your while factoring in the cost of having a technician do a full service on the machine. I wouldnt pay more than about $600. If youre going for a second-hand machine, a nuova simonelli or a wega might be better value.