- Choose either full capitalization or not, in europe usually you do not (e.g. Operating system, USB ports, Screen size), so whichever you choose, be consistent as you have a mix at the moment
- Summery --> Summary
- The second column should be left aligned, and then the field should be left aligned, but in a different cell so that they are all aligned together. Right alignment is usually reserved for numbers
- I think the Y-axis lines in the graph are distracting and you should go for a white background
- Personally, I think the summary is more important than the specs (as you are a brick and mortar shop), so Have the summary on top
- I wouldn't graph "condition" as it is a more qualitative metric than a quantitative one.
- Less is more, I wouldn't graph RAM and let the RAM component be part of the processor score
All in all, its a good idea, you just have to put the effort in keeping it consistent and relevant. for example, when a new model comes in and blows everything out of the water, you will need to re-scale all the labels, otherwise it doesn't make sense anymore. And while the scale can be arbitrary, the scoring should not be arbitrary, you shouldn't just randomly score a certain CPU because you think its good or not, get proper numbers, otherwise down the road it will not match up between products.