Shipping Costs Skews Prices

I'll sum my request up in a real-world example: I base the prices I list cards at on the ungraded prices on PriceCharting, and I offer free shipping. Just 1.5 weeks ago, this card's ungraded price was $3.01. Now, because of the three highlighted sold prices, it's down to $2.27. 

In reality, with shipping included, the buyers for those three cards paid $5.18, $1.94, and $4.44 respectively (I looked them up). Instead of a $0.99 average between the three, in reality it was a $3.85 average. Not including shipping in your sold prices is costing me, and probably other people, money.

I believe on the internet an item's price is the amount of money somebody is willing to pay, shipping included, and I believe PriceCharting should reflect that in some way, shape, or form. If a few people decided to drop the price of a base set Charizard by listing many of them for $25.00 with $175 shipping, people using PriceCharting would be affected and the market would be disrupted. After all, do you not take shipping costs into consideration when purchasing something online?!