Amazon has Suewio reeds that come out to 90 cents (US) each (Tenor), half the price of Rico orange box. They are extremely low quality and very inconsistent. But some play fine, at least for a couple of weeks.
Synthetics may also save money in the long run. Bari brand reeds are the bottom of the barrel, but at $10/reed (when you can find a deal), they're tolerable for practice, especially on bigger horns. I've tried no-name Chinese synthetics and they were completely unplayable. I've also tried just about every other synthetic on the market. Legere is the closest to being playable, but is also very inconsistent. Some sound fine, others like a duck call, others won't make a sound. Biggest downside is they're very expensive.
FWIW, I've played Rico orange box (and their ancestors in the wood grained box) for over 40 years with great success. LaVoz is another cheap reed about the same quality as Rico. I wouldn't be surprised if they came off the same line at the factory.
mmichel, please tell me where you find those cheap Rigotti's. Everywhere I've looked (including the shops you linked), they're double the price of Rico's.