Investment advisor site Motley Fool is suggesting that Apple's stock is over valued and that investors should consider Apple's entire product line and not just the iPod.

Fool contributor Kelvin Taylor writes: "There is no question Apple has a strong product line with the iPod and is poised for solid growth. Yet Foolish investors need to consider the entire product line and not just one or two hot-selling items."

He notes that, despite the success of the iPod, when it comes to Mac sales, Apple is the only computer maker in the top 10 to have posted a decline in unit sales this year.

He concludes that: "The continued exponential growth of the wildly popular music player is questionable in my book. With competing players being introduced at a rapid pace, the iPod's market share could fall, and with it Apple's stock price."