I have two great lenses for sale:
1) Sigma 10-20mm f/4-5.6 EX DC HSM. This is an ultra wide angle lens for the APS-C sensor camera (i.e, for any Canon that does not have a full frame sensor. Like 550D, 60D, 7D and so on). It has very good image and build quality. I've also included a Hoya Super Pro1 77mm UV filter for this lens.
In the gallery below, first four photographs have been taken with this lens.

Sigma 10-20mm f/4-5.6 EX DC HSM - with the hood, on the right.
"In the Tamron 17-50mm f/2.8 XR Di II Lens, we have a very useful tool. Since it is small and light, we can take it everywhere. Since it is fast (f/2.8), we can use it in low lightand indoors - and to stop action. Since it has very good image quality, we can use it for important shots. This list along with a nice general-purpose focal length range fills the requirements of a huge range of photographic opportunities (I'll let you think of them). For the price, the Tamron 17-50 is a bargain lens.
Do not confuse the 'Tamron 17-50mm f/2.8 XR Di II' Lens with the 'Tamron 17-50mm f/2.8 XR Di II VC' Lens. Preliminary testing, confirmed by reader feedback, indicates that the older non-VC lens has superior image quality."
review by http://www.the-digital-picture.com/
I thought after all the talk it'll be a good idea to upload some photographs I've taken with these lenses so you can see what they can do! First four, as I mentioned earlier, were taken with the Sigma 10-20mm. And the rest with the Tamron 17-50mm under various lighting conditions.
Price
1) Sigma 10-20mm f/4-5.6 EX DC HSM + HOYA Pro 1 UV filter ($430.00)
2) Tamron 17-50mm f/2.8 XR Di II ($300.00)
plus postage, if it applies.
If you are interested, let me know. You can use the Contact form from the menu at the top or give me a ring.

Tamron 17-50mm f/2.8 XR Di II - with the zoom on the right.
