Shearstrength,
Not knowing what your experience level is, it would take too long for me to explain the entire process in its simpliest terms. However, we can try a few steps at a time, and see where it leads us. You should run with it as far as you can on your own, but advise if you run into difficulties, or when you are ready for more instruction. Others reading this can offer their own improvements on technique, and we can all benefit. We can hope, however, that we do not get too much chatter. Fair enough?
If you have not already done so, I suggest you start with the construction of your Master List. You do not need to complete it, but enter at least three or four items for try-outs. We can decide later whether we want to make it a separate workbook. For now just name one worksheet something like "Quote", and another "Master"
If your items have unique part or item numbers that could be easily used for look ups by the user, then disregard the following. (I am assuming the user will be familiar with only the Item Name.)
After entering a few items in the Master, go to the Quote worksheet. Click on View > Toolbars and verify that the Forms box is checked. On the Forms toolbar, click the icon for Combo Box, and then click and drag on your spreadsheet to make your box. Don't worry about the size or placement yet; you will fix that later. Right click on the box, select "Format Control", and tehn the "Control" tab. Click on the button at the far right of "Input range", and then select your Item Name column on the Master sheet (presumably column A). Excel will fill "Master!$A:$A" into the little Format Control box. Click on button at the far right of this box, which will get you back to Quote sheet. Follow the same procedure for for "Cell ink", except instead of a whole column on Master, you will select a single cell in an out-of-the-way place on Quote. For now lets make it A99. This cell will contain the row number when you make your Item selection.
Please advise if you want to continue... If yes, please also advise all your column headings on your Master sheet.
Thank you.