No idea about CO prices, but here, it depends on the amount of time that goes into your return. Generally, the simpler it is, the cheaper the return. However, you haven't given a lot of detail. What forms did you file last year, where there sch A to F, did you have a ton of stock sales without basis, PTP income, etc? A ton of items that need to be input? As well as different firms have different minimum prices. I know a few firms in my town (in the midwest) that start at $300 and go up from there. And even that is usually underbilling, especially in the first year (as there are a ton of inputs into the professional software to make sure that all of the state level items are correct (at least in my state).
But, like other posters mention, the real value isn't so much the compliance (filing out the return), it is the experience and and knowledge (especially if you don't know what you are doing or what is deductible) that is what you pay for. Though this year is going to be somewhat screwy, due to the TJCA, and forms and regs still being finalized (for example: the 199A final regs were only posted to the federal register this week, and they had some wording changes from the final reg draft from a few weeks ago).