art collecting guidelines for comic book conventions

My passion in life is comic book artwork having amassed a large collection over the past two decades of which I am very proud. I collect original art and drawings from comic book artists of many different eras from silver age to modern.  After talking to lots of other collectors online over the years I have found there are a lot of good guidelines which can benefit your collecting adventures, especially if you are just starting out.  If you make a bad name for yourself the artist will remember you, and because the comics art collecting community is so small, a bad reputation can get around in no time.  Below are a few good rules, you can abide by when approaching artists at comic book conventions.  Number one, you should get into the convention as early as possible because some artists like Mark Brooks are so popular that their lists can fill up very quickly.  Personally, I go for higher end artwork such as original art or very involved commissions which are either already available or in the case of a very detailed commission.  The artist will want to do the drawing from home. But if you are looking to get something much smaller the first thing you should consider is bringing your own paper, or a sketchbook.  Most of the artist will have their rates listed on the table.  They break them down into the amount of work that will be involved.  If you want just a head sketch that will be lowest cost wise.  Next is a bust rendering, which would be the top half of the body and then last would be a full figure.  Some artists also add a fourth pricing rate for two characters, and obviously that is going to be the most expensive because it is the most time-consuming. above all, remember to be courteous.  Most of the artists have probably traveled a long way to get to the comic book convention, and we should all consider ourselves fortunate that they are even there,