2005 Tahoe exhaust

[Brians4x4]

I am going to try to install my exhaust over the president's day weekend. I wan to run true dual glasspacks. I will be cutting the original exhaust right after the cats and adding a 90 degree mandrel bend on the left side and two 45 degrees on the right side and extending those of to the back with tips at a 45 degree angle. Not counting the tips the total has come to about 270 dollars. I will be getting black powder coated tips off of Craigslist for about 30 dollars. Is this a good price for a dual exhaust? I want to do all the work myself.

http://www.halloweenforum.com/members/calloween-albums-odds-ends-picture107863-420609-352829794736799-100000293439421-1322689-1390389809-n-2.jpg