We currently have a Trefis price estimate of $337 for Apple's stock, about 30% above the current market price of $259. Trefis members have created forecasts for two drivers of Apple's ( AAPL) stock over the last week: (1) iPad Pricing and (2) iPad Units Sales. Their forecasts suggest that iPad Pricing will trend higher, while iPad Units Sales will trend lower than the Trefis forecast. These projections suggest a combined upside of only 1% for Apple's stock.The iPad constitutes only 8% of the $337 Trefis price estimate for Apple's stock vs. the iPhone's 50%. The iPad competes with devices like Amazon's ( AMZN) Kindle, Sony's ( SNE) e-reader, and mobile devices from HP ( HPQ). Given that the iPad accounts for a small portion of Apple's overall business, the stock is not very sensitive to (1) iPad Pricing and (2) iPad Units Sales. Below are charts showing recent estimates created by Trefis members for the two drivers in detail.