Holographic Will Example Tip For Selling Pokemon Cards On Ebay?

Tip for selling pokemon cards on Ebay? - holographic will example

My son has a lot of Pokemon cards is not because he is too old to go and decide that they can sell (or several) who want to save money / us and to save the money to purchase a good DSI DSI and a few points. Do you have any advice? Here are some facts about their cards:
It has one or more cards in 2000.
about 50-75% are rare, Holos
Apparently he has many 'EX and LV.X "cards. It has some special cards and pop.
It has maps of French (from France), but do not want to sell if they had a lot of money.

We are concerned about the people an opinion on prices.
Contact magazines, price guides and stores a value on some maps, which may seem too expensive for the buyer. What I want to do "combinations" that are collected in which specific cards, but u do not know if it's a good idea or not. Here's an example:
Pop 6 Holographic x1 Riolu, Riolu D / P x1, Lucario Holographic D / P x1 and x3 Lucario Lv.X. The price must be at least 75, because according to our guide prices for a MAMagazine LV.X $ 30 Lucario Lucario is $ 20 per POP Riolu is $ 10, and Riolu is a dollar, so the total was about $ 100, but some people seem to be expensive. So what do we do?

Please give sensible answers.

PS: Most stores sell the tickets on eBay in the real price, while other costs. Really do not want cheap.
I looked at the prices of other ideas for cards, and I saw a shadow Lugia sold for $ 300 This seems expensive for me. If any of you still play pokemon, you buy tickets?