How is this a deal? Basic manual desoldering pumps start at $3-$4 in (specialty) stores. The cheapest sell for $0.99 on FleaBay, shipping from China included.
It is a deal because you are getting brand name product with something like 50 years of reputation behind it.
All those cheap 99 cent Chinese knockoffs are copies of these Edsyn products. The problem with Chinese is that they don't have the Edsyn's quality. If you desolder something two or three times a year, then Chinese stuff is fine.
If you do small to medium production, you will want something better, like this Edsyn product.
Basically it comes down to the question: How much desoldering do you do?
Also Edsyn shipping charge is horrible. If you can use My UPS/FedEx account, then shipping is really low.