What gets my attention is the subject of the product. Does the topic interest me or is it for any of the systems I play (or would like to play).
As for what gets me to actually buy the product, there are two things. First, there is the quality/treatment of the material. Second, is whether not I will actually get plenty of use of the product either in play, as inspiration, or as reference. For instance, even though I do not run GURPS or Ars Magica, I own several GURPS products and the Ars Magica core rules.
As for what gets me to actually buy the product, there are two things. First, there is the quality/treatment of the material. Second, is whether not I will actually get plenty of use of the product either in play, as inspiration, or as reference. For instance, even though I do not run GURPS or Ars Magica, I own several GURPS products and the Ars Magica core rules.