Don't be fooled by the lower-priced yaks - many of them are pretty well made.
The majority of them come from China and they now have the roto-moulding process pretty much sorted (it's not exactly rocket-science!).
Have a look at eBay, there are more and more sellers flogging the same range of yaks. Prior to getting my current yak, I bought a couple of them
and was very impressed by the value for money. The quality was fine and the designs were well thought-out.
Here's a selection (I have no affiliation with any of the sellers):http://www.ebay.com.au/itm/140708258924http://www.ebay.com.au/itm/180825561836http://www.ebay.com.au/itm/290674718455http://www.ebay.com.au/itm/140709289963http://www.ebay.com.au/itm/280831805342
Most come with a basic seat, paddle and rod holder(s) and for $500 or so, they're a great way to get into yakking.
They might not be ideal for going offshore, but for bays, lakes and rivers they're ideal.