Hi, welcome to the site and thanks for your post. Sorry to hear you are "disenchanted"!
I really don't know if WhizAnalysis is still active - make your own mind up from what you have found. You can always try contacting them and asking.
Broadly, analysis services use official eBay data or their own archive; or provide a tool so you can collect the data from eBay's completed items search.
The advantage or those that use eBay or their own data is that you get instant results. The disadvantage is that you are limited to the data they have available. Only deepanalysis provides a free trial, although you can subscribe to PriceMiner or Terapeak for only $9.95 per month. Category link.
The advantage of the "data collection" category is that you can collect whatever data you like and get the full details. Disadvantages are that they take some time to run, and it will take a while to build up a full picture as the completed items search only covers 14 days at a time.
I have only ever heard good things about AuctionIntelligence and they regularly update the program to compensate for eBay changes and to add new features - plus they have a two week trial (it's a PayPal subscription so remember to cancel if you don't want to keep using the program).