I think you should read this thread on sales
http://www.bgol.us/board/showthread.php?t=509358
Iron Man # 6 is worth $300.00 in GEM MINT condition.
Most people own this book in a 7 to 0 condition and it is worth at the most $24.00
Iron Man # 11 is worth $240 in GEM MINT condition
Most people own this book in a 7 to 0 condition and it is worth at the most $19.00
Iron Man # 15 is worth $200 in GEM MINT condition
Most people own this book in a 7 to 0 condition and it is worth $14.00.
Iron Man # 30 is worth about $80 in GEM MINT condition
Most people own this book in a 7 to 0 condition and it is worth about $7.00.
Part of a side hobby/business that I have is that I help people and sometimes stores sell old books and comics either online or directly with a network of collectors that I've built up as a kid (Since I was 13). I can help you but I get %15 off the top. Which would not be very feasible for you unless you are dying to get these off your hand.
You best bet would be to post them online through Craigslist and snag a buyer...just be ready for them to pay low because the back issue business is a dying across the world.