My first DSLR was an A100. I took over 10,000 pictures with it. All over the world. Two lenses. 18-70 mm and the 75-300 mm. Both Sony. I replaced it with an A200 in 2009. The 18-70 mm lens''s focus mechanism failed (at Masada in Israel) and I was left with the 75-300 mm lens for the A100 for the rest of the trip. Fortunately I had my older Olympus C-740 point and shoot for pictures requiring less zoom. The A200 came with another 18-70 mm lens that still works fine. I quit using that camera last year when I got a Canon T5i.

Back to your question. For $150 I don't think you would be I'll served by taking that A100. 10 Mpixel isn't a big handicap if you aren't planning on blowing up large prints. And even with that limitation it does quite well. I was in a standards committee meeting in Paris shortly after I got the A100 and the folks from Sony in Japan hadn't seen it. They were impressed. Two pictures I took with it on that trip (early 2007) stand out in my mind. The first is a shot I took looking down the street at the Arc d'Triumph from the Place d' last Concorde using the 75-300 mm lens at full zoom. You can make out the individual bars of the fence at the top of the Arc when you zoom in digitally on your computer. The second is a picture I took inside Versailles. From the back of the Chapel, looking all the way to the pipes of the organ in the front. No flash. Handheld 1/2 second exposure. Solid picture. Even when zoomed in quite a bit. The anti-shake mechanism in the camera body Works great.

Go get it and have fun. And pick up a spare battery. Sony branded, the non-Sony branded ones I bought from some outfit in New York (too many years ago to remember who) wouldn't work. They took a 3charge, but the camera wouldn't recognize them.

Oh, and my picture standing with the pyramids in the background was taken by my wife with the A100.