I think letter writing might entice a big studio to license a title out to a smaller company. They may not want to 'risk' their own money or effort but if they know there's some market, letters may turn the tide to seeing more shows licensed to other companies.
The differences are that Adventures Of Superman is good, it has fans outside of Superman fans and it sold better than a low budget 1980's syndicated series (even one from the Superman franchise). The Superman fans are just a good base, that 99 out of 100 shows don't have, that added to the sales...
A sales rank of 2,600 isn't exactly huge. Star Wars: Episode III is at 145 and it's been out for nearly a year. Band Of Brothers has been out for years and it's at 76. Granted those are very popular titles but even an overall small title like One Tree Hill S3 is at 96.
The stores will stock the most of whatever is selling. They don't care what it is as long as it sells. If a show from the 1950s is selling as quickly as they get it, they'll get more copies. When the next release of that series hits, they'll be sure to get more copies initially.
It doesn't make his point any less valid. It'd be great if there was more classic stuff available but just because there's some people who want it doesn't mean that it'll sell well enough to be a profitable release for studios. They could have the greatest show of all time sitting in their...
Good question. Here's a better question, how many people who hate Buffy have even seen it? I'm not saying that everyone who doesn't like the show has never seen it but I bet a lot of people who say it's bad are basing it upon its title as opposed to actually watching it.