I know I asked this question in my blog, but I thought I'd open it up to others, since I didn't seem to see anything similar to this in another thread, and maybe someone might have the same question. Just this last weekend Bella was microchipped for $20 at a little pet fair from a reputable shelter. I registered her online for free and even got a call from the place to verify my information. I was surprised at the low price, especially since I've heard of so many variations ranging from $30 which was the cheapest I'd heard of before going to the fair, all the way up to $100+. Some places charge for the placement, and then have another charge for registry. I think the highest I'd seen it was about $150. I'm assuming all information goes into one database and all microchips are can be scanned by those ring like hand wands...so why the differences in prices? My other question is....can the microchips ever grow out of the skin and fall out spontaneously? Should I have them scan it periodically to see if it's still in?