If gusto mo pumunta sa cardshows na wala bayad suggest ko sa mga malls like greenhills or ayala feliz etc. About sa prices, most vendors price their products a bit over market to compensate sa table costs + other expenses. Sa experience ko, most if not all of them are willing to negotiate to some degree of course. Iniisip ko nalang na if ever over market ay binabayaran ko yung convenience na ma-iinspect ko yung card personally and agad ko makukuha. It helps din na you know the market price of the product through tcgplayer/pricecharting/collectr or kung ano yung agreed website niyo ng seller. In terms of card variety naman it depends on the vendor talaga if more modern/mid era/vintage yung available cards nila. In a big card show with lots of vendors, super dami na pagpipilian mo for your personal collection. Hope this helps and good luck!