With real end caps.
... its Ibtanked
I have seen a few "cheaper" Pyrex tanks but they suck. They don't have real end caps, they have stoppers which are a PITA. The tube itself is $5.00 and your choice of end caps for $14.00. They have a large variety of end caps including 3 different types of metal caps (which are more expensive).
They also have a huge assortment of other Pyrex styles that are more expensive if you need want more style. The combinations of end caps / tanks are pretty endless.
Clear Tank: http://ibtanked.com/
End Caps: http://ibtanked.com/
Full Pyrex XL tank set up for $19.00