I've successfully negotiated a few domain purchases and unsuccessfully tried for a few more. All the unsuccessful ones are the professional squatters who won't

I've successfully negotiated a few domain purchases and unsuccessfully tried for a few more. All the unsuccessful ones are the professional squatters who won't take less than 4-figures - although they do regularly e-mail with lower and lower prices so never take the first offer from these guys. The successful purchases have all been from individuals who registered the domain at some point with an idea that they never developed. If it's useful to anyone, here's an example of the opening note I send (improvement suggestions welcome). I make an opening offer around 50-75% of what the actual maximum is, make note that the site is inactive and costing them money, make it clear we're considering other options but that we are ready to purchase quickly. Even if the purchase is for personal use I'll reference a "client" as it helps to have a man behind a curtain who just won't budge on his price. ----- Dear Sir/Madam, I see that you own DOMAIN.COM but are not currently using it for an active website. I am currently looking for a domain name for a client of mine, and your name (DOMAIN.COM) is on our short-list. We have budgeted around $250 for acquiring new domain names and my client looking to close a deal quickly. Please could you let me know if DOMAIN.COM is for sale, and if so what price?