I've sold art work over the years... From commissioned portrait paintings, photographs, logos and even knitting.. I agree with all the above.. Just wish I had a mentor or someone who could have directed me the right way when I was much younger.. Mid American Travels commissioned me to do a logo for their Honeymoon in Bahamas years ago and I got total of 100 bucks.. To this day they still use that logo and I get no credit and get no money.. Burns a hole in my crawl each time I see them using my art work still (whenever I go back home).. I got screwed by my own ignorance... Right now I'm doing adult computer generated 3D images for a friend I know who has two adult sites online.. Even though I trust him, we are working on a contract! ... First job I ever had was working for Times Herald Union Newspaper in the Ad department then I went onto Dillard's advertising department, Memphis Magazine and Web Advertising.. I understood what work I did for these companies were not my own but the ownership of the corporation.... But what I do on my own is my future reference and my bread and butter...I personally think you should charge according to your experience and expertise.. If your a good artist and you deal with your clients fairly, no doubt you'll be mentioned to other possible clients.. As you make a name for yourself, and depending on the demand, then you most certainly should go up on your price as time goes on... Good luck to you and congrats on the offer.. =) ~Cindy