I know this is an old thread, but as one who has used hundreds of patches over the last 3 years fixing flats in the inner city (which I thank God I can still do), I am always looking for the best price for quality. And recently I came across a site that sells 48 33mm x 23mm patches for 1.37 incld. shipping if you buy 3 or more packs, otherwise it is 1.60. I have bought from them (Banggood.com) and they were reliable, though it takes about 2.5 weeks to arrive. The next best price (at Ebay) for that (standard) size is 1.46 for 48 patches, and which i know are good patches, with the only drawback on such is that sometimes the foil that you take off is too thin, and sometimes it will break and you need to peel it off in more than one piece. Also, on one kind of these then the plastic covering on the top is too strongly bonded. I think the patches from the first link are like that, while the second look like ones I have used before, and which also stretch well with the tube. Sometimes, like for real blow outs, I need to patch over part of a patch and so these types are best.

If you need larger ones, the first site sells 24 of the 32 x 50mm size patches for 1.89 (3 for 1.65) which is far cheaper than anywhere else I have seen. The foil issue mentioned above is a particular problem with these though. And note I have no relationship at all with these sellers, as I am just a buyer.

All the above are without cement. Beginning about 0.50 more (1.95) you can get 48 patches with cement here (Ebay). There was a thread some time ago here that discussed the issue of the best cement, and the prices I list in this post should still be close, except that at Amazon Slime Cement - 8 oz. has decreased to $6.75 ( with free Shipping on orders over $35) [edit:" went up to 7.17 just after this, but is 5.99 at Pepboys but shipping is 5.00]. While I have never tried REMA, I have not seen any superiority btwn the ones I have tried (Monkey Grip, Slime, Bell, Western Weld) and the Chinese cement (in particular one labeled "Michel") that comes with some Ebay packs.

What I did this year was to buy about 20 of the Monkey Grip EZ Fix Bicycle Patch Kit from Blaines, at 0.69 a piece, which has 3/8oz tubes (larger than Ebay packs) of the cement along with the equivalent of about 9 patches. But about 20 is needed to bring the cost down due to shipping. They also have 1oz tubes of Victor Rubber Cement for .99, plus shipping. But the shipping basically doubles that (and yet shipping is almost the same when adding two rolls of 35yds Gorilla Tape at 6.99). So the lowest price for 48 patches is 1.37, which with $6.75 for a 8oz can of Slime would be the cheapest way to go, but which is messy to use.

Hope this helps some.