I've got a decent bag for my camera that is fine for most uses, but it only has a somewhat small strap for holding/shoulder, and the bag is a bit large. We're planning a Florida/Disney vacation next year, so I want something as small as possible that can go on my belt. I just want it to carry my G5 w/kit lens and 45-150mm lens. I won't use it very often, so I don't want something expensive. Around $20 or less would be great if such a thing exists. Even better would be something I can get from Adorama since I still have my gc to burn.
Kata makes good bags, and they are available from adorama - perhaps this one might work? price is $29.99 shipped (on sale at the moment) Kata Lite-435 DL Shoulder Bag KT DL-L-435 or the slightly larger version for $5 more: http://www.adorama.com/KADLL437.html
My El Cheapau suggestion is: 1) get any half decent bag from a thrift store or wherever (not the "vintage" overpriced stuff), as long as it stays in one piece and the strap is sensibly attached. Messenger or whatever. 2) find any padding or inserts that fit it (ebay?) or make your own. A friend of mine has made a bag for himself that way that's easily in the Domke league.
You mention something small that can go on your belt, which made me think of the Capture Clip system from Peak Designs. It's quite a bit more expensive than your $20 budget, though. If you went with something like this, you could use a small lens pouch (also mounted to a belt) to carry the extra lens.
It's not a belt bag/fanny pack, but the Lowepro Exchange could do the job for $29: Lowepro Exchange Messenger Shoulder Bag, Gray LP361240EU
Thanks for the ideas. I ended up going with the Lowepro Edit 140 that was $6 at Newegg. It's not going to really work on my belt like I hoped (too big, though it would work OK if really needed), but slung over my shoulder should be OK as it's very light. It fits the G5 with 2 kit lenses perfectly inside with more room in the pockets outside for other small items.
I got a cheap bag from ebay, less then £20, and was thrilled when someone asked if it was a billingham bag
Clearly the person asking has never seen a Billingham bag - they are very characteristic (no harm meant - just saying, I don't own one) Very good find, looks really decent. Metal rings holding the straps - Tiffen / Domke, are you reading this?
That looks identical to the 'cheap china bag' (as they described it) that Digital Rev durability tested along with a LowePro, a Crumpler and a Domke a while back. Look at about 2 minutes 42 seconds and pause the youtube video and you'll see what I mean. Camera Bag Durability Test pt. 1 - YouTube