"Call us" is an instant no sale for me. I also don't buy from companies that don't publish their manuals online. I nearly always read the manual before buying,

"Call us" is an instant no sale for me. I also don't buy from companies that don't publish their manuals online. I nearly always read the manual before buying, because 99% of the time the marketing copy or "specifications" page is inadequate to properly evaluate the product. If the manuals aren't published, they might have something to hide or they might be in the habit of making documentation conditional on support contracts. Either way it makes it impossible for me to evaluate the product.