Bicycles as a rule don't end up being particularly valuable as collectibles. Your best bet is to browse ebay, Craigslist and such to see what similar bikes are selling for.
You can find a mountain bike on the top of mount Chiliad.
You can find a Craigslist listing for a full suspension mountain bike by visiting the Craigslist website, selecting your location, and searching for "full suspension mountain bike" in the search bar.
http://www.houstonbiketrails.com is a good website to find mountain bike trails and bike paths in the South Houston and surrounding areas.
You can find a 26-inch mountain bike tube for purchase at most bike shops, sporting goods stores, or online retailers that sell bike accessories.
You can find a vintage Trek 820 mountain bike for sale on online marketplaces like eBay, Craigslist, or specialized vintage bike shops.
You can find a 26-inch mountain bike inner tube for purchase at most bike shops, sporting goods stores, or online retailers that sell bike accessories.
You can find high-quality MTB decal stickers for your mountain bike at specialty bike shops, online retailers, or directly from the manufacturers of your bike or favorite MTB brands.
You can find a reliable 27.5 mountain bike tube at most bike shops, online retailers like Amazon or REI, or directly from the manufacturer's website. Be sure to check the specifications and reviews to ensure compatibility with your bike.
You can find vintage tandem bikes for sale at antique shops, online marketplaces like eBay or Etsy, and specialty bike shops that sell retro or vintage bicycles.
You can find high-quality mountain bike frame stickers for customization and personalization at specialty bike shops, online retailers, or custom sticker printing companies.
You can find a reliable and durable 26 mountain bike tube at most bike shops, online retailers like Amazon or REI, or directly from the manufacturer's website. Be sure to check the specifications and reviews to ensure it fits your bike properly.
Yes, if you can find the correct bottom bracket for the frame.