Hi, sorry for the delay!
My best guess
Okay, hand blown, date would be mid - late 19th Century - I've not bought or sold for quite a while, but I would expect the value to be approx £15 - £20
Values are age / design and colour based, from cheapest being clear, then blue, then green, then amber (with china ones right across the range depending). Some early plastic ones have some value dependent on branding.
Within the colour parameters, stemmed, tend to be more valuable and obviously hand blown are at the higher end.
You can easily get carried away with collecting if you're not careful... I had over 300 at one point and all different