There will never be a perfect time to invest, more than likely, unless you're extremely lucky, you will buy and experience both dips and peaks. If you can afford to lose your money invest it, if you cant, don't.
At the moment prices will be lower than they have been due to people cashing in to pay for their Xmas shopping. I would expect that, and this is purely speculation, once the banks reopen, after the Xmas break, prices will probably bounce back up. But, that said, they will probably drop down again for new years/around new years due to people over spending when celebrating the date changing on the calender.
I like your way of thinking. I also think that there is no perfect time to invest because no one knows the market trend. However, each person has his own plan and chooses it to accept whatever results.
actually there is a perfect time to invest, if the price goes down grab that opportunity, because we will never know when the market price will change, it can be soon enough.