Following are depictions of merchants' stalls and shops from the later Middle Ages and Renaissance. While most sites for re-enactment events lack these sorts of permanent structures (although some have found ways to create portable structures emulating these sorts of buildings), these links illustrate how different sorts of wares were displayed.
A candle-seller, Tacuinum Sanitatis (Österreichischen Nationalbibliothek, Codex Vindobonensis, series nova 2644), c. 1370-1400
Tacuinum Sanitatis (BNF Nouvelle acquisition latine 1673), c. 1390-1400, includes sellers of wool clothing (fol. 94), linen clothing (fol. 94v), and silk clothing (fol. 95), as well as several merchants of foodstuffs; use Mandragore to view the manuscript
Merchants, De proprietatibus rerum (BNF Fr. 22531, fol. 257v), first quarter of the 15th century
Tacuinum Sanitatis (BNF Latin 9333), 15th century, includes sellers of wool clothing (fol. 103), linen clothing (fol. 103v), and silk clothing (fol. 104), as well as several merchants of foodstuffs; use Mandragore to view the manuscript
There were stallis by þe strete stondyng for peopull, Werkmen into won, and þaire wares shewe, Of all þe craftes to ken as þere course askit: Goldsmythes, Glouers, Girdillers noble; Sadlers, souters, Semsteris fyn; Tailours, Telers, Turners of vesselles; Wrightes, websters, walkers of cloth; Armurers, Arowsmythis with Axes of werre: Belmakers, bokebynders, brasiers fyn; Marchandes, Monymakers, Mongers of fyche; Parnters, painters, pynners also; Bochers, bladsmythis, baxters amonge; fferers, flecchours, fele men of Crafte; Tauerners, tapsters, all the toune ouer; Sporiors, Spicers, Spynners of clothe; Cokes, condlers, couriers of ledur; Carpentours, cotelers, coucheours fyn; With barburs biget in bourders of the stretes; With all maister men þat on molde dwellis, Onestly enabit in entris Aboute.
A mercer's shop, Faits et choses du monde (BNF Arsenal 5081, fol. 33v), c. 1480; the display includes jewelry, belts, mirrors, combs, pins, needles, and toys
Marketplace frescoes at Issogne, late 15th-early 16th century (detail)
Detail from The Annunciation in the altarpiece of the Church of St. Gumbertus in Ansbach, c. 1490-1510
The market street in the Book of the government of princes (BNF Arsenal 5062, fol. 149v), beginning of the 16th century; further analysis of the illustration here