I'm browsing craigslist, and up for sale that I'm interested in are these lenses:

Kenko 2x teleconverter $40
Tokina 28-70 f/2.8 $100
Tokina 80-200 f/2.8 $100

I can sell my 70-210 f/4 for at least $130 to KEH, but I can probably get $200 or a little more on eBay for it. Should I attempt to sell that to buy these lenses? I also just emailed someone about a 28mm f/2.8 to see if he will separate from a package and sell it cheap enough.

CN: Sell 70-210 f/4 for lenses listed above?