Servimer is great! I've only done one shop but their fees seem fair and they respond quickly when you have questions or ask about scheduling. But they pay 30-35 days after the month in which your shop was completed, so just a heads up since it sort of sounds like you're asking about companies that pay quickly.
Informa will have banking shops there starting late January and there are normally at least 10 shops with pay starting at $50. Here's our link to sing up [www.sassieshop.com] . We ALWAYS need more shoppers in Chicago
Field Director (In-House Scheduler)
Informa Research Services