i wanted to post this in the plant sourcing area, but i cant seem to post there...hope this is ok to post. what i want are some slides that i can use to measure small things (like spores and pollen, up to seeds). When i search for "stage micrometers" all i can find is $150+ slides! is this normal? are there any alternatives? all i need is a simple glass slides with etched measurements....i dont get why so expensive. any help would be GREATLY appreciated!!!!