I think I get attached to my work and sometimes don't want to let certain pieces go. But the rest of the time, if someone seems like they really like a piece, I have a hard time not just giving it to them. That's not a good way to make a living as an artist, though, is it?
I've had some issues with pricing recently. I won't bore you with the details, but the difficulties have helped me see the wisdom of what you always hear about pricing: be consistent.
Deciding on a price
Pricing your work is tough, especially when you're just starting out. Maybe you're having a show in a student gallery, exhibiting a piece in a local art group's show, or entering regional or national juried shows. If your work is available for sale, you will be asked to include pricing information.
My best advice is to ask around - how are artist's with similar work pricing their work? Then you have to take into account your own "status." Are you just starting out? Have you been painting (or whatever it is that you're doing) for 20 years? If you've been doing watercolor for a year and another artist has been doing it for 25 years, then they will most likely be able to command a higher price for their work.
Then you also have to consider your materials. If you use something rare or expensive, then take that into account when pricing. Framing is another issue - if you've spent a lot on the frame, be sure to include that in the price.
Time is another factor. Some people say not to consider time, but if your work is
very time-consuming, you could consider it.