are comic books an investment?

I recently reignited my interest in comic books / graphic novels. Every few years I would buy a few series until I had a complete story arc to read (dislike reading them in installments).

I've entered most of my books into www.mycomicpile.com which actually tells you the market value of the comic books as well. I don't have that many, but seems the overall collection is worth about $2400 - more than i imagined.

What truely got me back into it was visiting a comic store liquidation - I was able to buy a few hundred comics for $0.10 each. The vast variety, quality of art and interesting stores pulled me back in.

Now I've signed up for a pull box (the store puts comics into your box each month - like a subscription) and will probably buy 10-20 comics a month. For an overall spend of about $32.50 - $70.00 per month. Honestly, I feel a bit bad about spending that kind of money, but I do get much joy from reading them and saving them for my children (who will be able to enjoy them in the far future). The again, other people do have much more expensive hobbies and I am saving aggressively.

According to mycomicpile.com, most of the comics seem to retain their value and increase in value at a fairly constant rate; i.e. most older books seem to appreciate in value up to the price of new comic books; e.g. what once cost $1.50 is now worth about $3.00, which is market price for new books.

I'm curious, has anyone tried to sell individual comics or a comic book collection? Can you really get "market price" or do you have to discount it tremendously? What's the most efficient way to sell a comic book (or collection)?

Thanks for your advice,
Have a great weekend,
makingourway