If you don't mind a somewhat longer blade (8 1/4) Cold Steel OSS is a massive bargain, IMHO. While not technically a dagger (has a shallow clip point) it is narrow , and sharp on both edges, so is a dagger in effect. Cold Steel also makes a much smaller Skean Dhu, called Brave heart, that is extremely flat and concealable, but has a 4" blade, which is long for what's ,basically, a neck knife. Either can be found on ebay/Amazon for less than 60 bucks. I have both and they are dependable and high quality. I don't know where you live but, hopefully, you know that in many, if not most places, these knives will get your ass arrested in a NY minute, even if not concealed, so be advised.