I didn't think to record how many for sure because I've had requests for items repeat a few (1 item, 2 - 3 ) times in a day before, but is this normal or a bug? ... Out of 15 requests today Sarah asked for (if memory serves correctly) at least 6 Common Warador Beanbags and 4 or 5 Saxophones. That seems excessive. (Is the randomizer glitching?)

This was fine since it was Sarah asking for really common and plentiful items, but what if it had been one of the more expensive Quests asking for rare or retired items where each purchase, the next can be 50k or even 500k sP more expensive than the next?

From my experience questing for her last year, yeah, Sarah has a really small item pool, not only she will ask for lower rarity stuff but it seems she only asks for cheaper items too (in the NPC shops). I don't know what her rarity threshold is but I don't think she asks for items over 2k, which is most of them. I have no idea if there's any other restriction but I'm pretty sure there are.

TL;DR: it's not a bug, it's just a small pool for Sarah's quests, so you don't have to worry about other quest givers, especially because, at worst, they will ask for r160 or r175, which have a price cap (I know Quentin's to be 50k, don't know about Cinthia) - otherwise they only ask for restockable items.

[edit] Out of curiosity, what you're describing happened once many years ago: a perfect mix of a stupidly small pool, the entire site questing like their lives depended on it and some people not caring about profits because they wanted the achievement. Such scenario is very unlikely to happen with our everyday quests. And I'm sharing this fact literally just because it was hilarious as hell.

i've once had alexander ask for 4 times in a row, which was hilarious. as sketch says, its just an item pool size! makes for some shenanigans, its why wizard has a weird... perchance for lingerie

Thanks Sketch. I knew they seemed to always be less expensive items ... which of course are going have less to draw from. (Though I've had her ask for items that were a tiny bit over 2000 when out of stock. Usually not by much.) And (also thank you) for putting my mind at ease about the price cap on the more expensive quests.

Although... one of the other Quests i completed later, in the first five things Maleria(?) asked for it repeated one of the items three times. ( on 1st, 2nd, & 4th or 5th time) I thought it was going to happen again, but it gave diverse requests after that. (Not unusual for three dispersed throughout questing, but for it all to happen lumped together was unusual.)

Edit: ah timing (not sure if pings work in edits on this site) ^^ Ah, okay, good to know that it's happened to others.
lol... some of those repeat quests does make one wonder about those NPC and what type of penchants they have. Some memory is almost being triggered... very foggy. I was really new to the site and Pete was asking for something (several times) with human ingredients. me: O.O?!

Yesterday Pete asked me for something four times in a row (though I can't remember what it was anymore -- a food item)