I'm going to NEAF for the first time and heard that there are
sometimes pretty good deals on eyepieces. I was thinking about
getting a decent mid power EP (12mm to 18mm range). Any suggestions
of what would work well in a f6 8" dob (I usually wear glasses when
observing but not always)? Roughly how much would it cost at NEAF
(I'd like to keep it under $200 if possible)?

Your help is appreciated!