I use UMAX Astra 2500. Its works just about ok. It was purchased quite some time back for about 2.5 to 3K. I occassionally scan pics and most of the time use it for OCR.
There must be some other entry level model now.
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Haven't checked with my dealer for quite some time, but if the Microtek 3800 is still available, it's a good entry-level scanner.
I like the very fast preview, and colour and greyscale reproduction is good. It has a slight bluish tinge, but such minor imperfections are often present even in much more expensive models, and can be easily corrected. Got it for 3.4k two years ago IIRC.