Most electronics stores such as Best Buy or Frys carry large TVs, and you can purchase them online from Amazon.com or NewEgg.com.
When looking to purchase a Techcraft TV stand then it may be possible to purchase on on the internet. Such sites as Best Buy advertise that they sell a Techcraft Credenza 70" TV stand as well as other sizes of TV stand.
24 inch TV's vary significantly in their weight, so it will be impossible to tell you the weight of them generally without a specific television in mind. I would research the television model you want on Best Buy and look in their specs for the weight of the tv.
Vlaanderen 70 - 1970 TV is rated/received certificates of: Belgium:KT
Lucky you that you can afford a 70 inch LED TV! There are many online shopping comparison sites that will allow you to research the current cost of a 70 inch LED TV.
UFC 70 Countdown - 2007 TV is rated/received certificates of: Australia:MA
70cm, 70m is too big.
70's Fever - 2008 TV was released on: USA: 7 December 2008
TMZ on TV - 2007 1-70 was released on: USA: 29 November 2007
Amazon.com offers a wide variety of TVs. Overstock and Best Buy are probably good for ordering online also. I think shipping will be very expensive. Perhaps you can order directly from the manufacturer like Sony or Sharp.
Ali 70 from Las Vegas - 2012 - TV was released on: USA: 25 February 2012
You can buy a tv in clubpenguin from the catalog in your igloo.(you must become a member to buy this thing)
70 things at the dollar store