Valuhost.com provides fully manged dedicated servers starting from $195 per month with setup fee- $145. It's Pentium 4 w/HT (Bandwidth 2500 GB, Memory RAM 1 GB, Hard Drives 2 X 80 GB).
Is the price all right for this kind of servers?

If its really fully managed solutions then seems to be fair.

With the managed services it seems like a fairly good deal. I had a quick read over their site and it seems good. But, with any host you got to be careful and make sure you choose well I would keep searching for feedback just to be on the safe side.

Check also Ahosting.biz - they are preaty good so far.

The price is quite allright for a high-end dedicated server, see if you can get any discounts for setup, it's possible with a lot of companies, if you pay for a few months or annually.

I heard ahosting.biz specialize in reselling plans, are their dedicated plans managed?

Yes, Ahosting.biz provides managed Linux dedicated servers and self-managed Windows dedicated servers.
But now this company provides dedi promo that gives you opportunity to get dedis for cheap prices if you need this service.

Thats a good price for a RAID-1 system, which is the minimum you want to consider for ecommerce with a dedicated server.

That pricing is reasonable for what they are offering. Never hurts to look around though.