Have began to think about seeling some trek stuff and wondered if you had a complete set of Star Trek Magizines (ones with the tech briefings) what would you sell them at i.e. selling price
A quick (and thoroughly non-exhaustive) check on E-Bay shows that a single issue is selling between $1.25 and $9.00.
Rarer copies obviously demand higher prices.
You have three choices:
1) you can sell them one at a time for the highest bid.
2) you can sell them one at a time for price set within those boundaries above,
or,
3) you can sell the complete set at a fixed price (based on the likely average of high and low prices).
Each approach has its advantages, and each has its disadvantages.
The only other option I would recommend is to have them evaluated by a reputable dealer of collectables or by an insurance appraiser.
If you take them to a used bookstore, they'll offer you pennies on the dollar (they're almost as bad as pawn shops).
A reputable dealer will offer you a better price, but still less than what you might get at auction. He may (or may not) also demand to purchase them as a set, rather than piece-meal.
The insurance appraiser may charge you a fee, but he'll at least give you a reasonable guesstimate of what it would cost to replace them...(and thus of their "true" value).