One thing I've noticed recently when comparing various oak bedsides is that the dimensions can vary quite significantly. This is apparently one of the oldest tricks in the how-to-sell-furniture book, as revealed by someone who works for a major UK furniture supplier.
If a manufacturer is struggling to compete with a rival on the price of their product, they simply make the furniture just a little smaller and the cost saving is enough to make a difference to the selling price. This can be a particular problem when shopping online because most websites show the furniture against a plain background and not next to anything else. I remember once marvelling at the price of a pine bookcase - before seeing from the details that it was actually a photograph of a DVD rack!
So, don't forget to measure up the space you have available for your intended bedside cabinet and then find something which is as close as possible within your price bracket. Not all bedside cabinets are the same - even if it looks like they might be.