I don't know if it's anything to go by, but I just checked out the painting on eBay and found one with a 'buy now' option of $129.00
I also did a little bit of research into the artist, who sadly died recently at the age of 54 - but is described as an "American painter of popular realistic, bucolic, and idyllic subjects".
However, the most notable line in his bio was something that spoke about how his work has been mass-marketed and how copies of his originals have been printed on a large scale.
As with any market, the more a product is available, the lower the demand or price it can command.
So if we're talking about an original Kinkade, then it may fetch a modest price - but if what you have is a mass-printed copy simply signed by the artist, then I wouldn't quit the day-job just yet!
That pretty much sums up the problem with Kinkade's work. He was successful and rich because he created an "empire" of pieces that were pleasant to look at - but had no real value.
To sum up... If you've just stumbled upon an old Kinkade gathering dust in the attic, it might not be the pot of gold we all dream of unearthing - but it may still be worth putting up for sale on an auction site to see if you can command $100+ for it!